val declarationGenerators = session.extensionService.declarationGenerators

        val generatedTopLevelClassifiers = declarationGenerators
            .asSequence()
            .flatMap {
                // FIXME this function should be called only once during plugin's lifetime, so this usage is not really correct (2)
                it.getTopLevelClassIds()
            }
            .filter { it.packageFqName == packageFqName }

    private fun findPossibleTypeQualifier(
        qualifier: KtSimpleNameExpression,
        wholeTypeFir: FirResolvedTypeRef
    ): ClassId? {
        val qualifierToResolve = qualifier.parent as KtUserType
        // FIXME make it work with generics in functional types (like () -> AA.BB<CC, AA.DD>)
        val wholeType = when (val psi = wholeTypeFir.psi) {
            is KtUserType -> psi